Bicycle lock



FIG. 1 is a perspective view of a bicycle lock;

FIG. 2 is a perspective view thereof with the shackle separated from the base;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top view thereof;

FIG. 8 is a bottom view thereof;

FIG. 9 is a front view of the shackle separated from the base; and,

FIG. 10 is a bottom view of the shackle separated from the base.

The broken lines are included for the purpose of illustrating environmental features and form no part of the claimed design. 

CLAIM We claim the ornamental design for a bicycle lock, as shown and described. 